I just heard today that Sodium Metabisulfate is bad for kegs.
Well, before I heard that I sanitized my first keg with the stuff (it was a few weeks ago). It was a relatively weak solution and I shook it up, let it sit for about 15 minutes or so, shook it again, then flushed it very thoroughly with clean water.
I can't see any physical signs of damage or corrosion inside the keg, but I was still worrying that I may have done some damage.
Any cause for concern here or should it be ok?